New Address? Addappt Lets Friends Follow All Your Moves

By

Walter S. Mossberg

Dec. 11, 2012 9:00 p.m. ET

Your friends and contacts change jobs, phone numbers, email addresses, and residences all the time. But keeping your digital address book or contact list current with all these changes is tedious at best and often impossible. So, the contacts on most smartphones and computers are usually out of date and incomplete.

Now, a tiny Silicon Valley startup called Addappt is trying to end all that by making your address book self-updating. The company is offering a free service and contacts app of the same name for the iPhone...